<template>
  <div class="container">
    <!-- 路径导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>内容管理</el-breadcrumb-item>
      <el-breadcrumb-item>文章管理</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 搜索区域 -->
    <el-row>
      <el-form :inline="true">
        <el-form-item label="文章名称">
          <el-input v-model="queryInfo.articleName" clearable @clear="queryList" placeholder="请输入文章名称"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" icon="el-icon-search" @click="queryList">搜索</el-button>
          <el-button type="success" icon="el-icon-plus" @click="toAddArticle">新增文章</el-button>
        </el-form-item>
      </el-form>
    </el-row>
    <!-- 表格区域 -->
    <el-table :data="articleList" border style="width: 100%" :header-cell-style="{'text-align':'center'}"
      :cell-style="{'text-align':'center'}">
      <el-table-column width="80px" prop="id" label="ID"></el-table-column>
      <el-table-column prop="articleName" label="文章名称"> </el-table-column>
      <el-table-column prop="articleIntroduce" label="文章简介">
      </el-table-column>
      <el-table-column prop="tabularChart" label="文章图片">
        <template slot-scope="scope">
          <el-image style="width: 100px; height: 100px"
            :src="url + 'downLoad?filename=' + scope.row.tabularChart"></el-image>
        </template>
      </el-table-column>
      <el-table-column width="80px" prop="readQuantity" label="阅读数量"></el-table-column>
      <el-table-column width="80px" prop="collects" label="收藏数量"></el-table-column>
      <el-table-column prop="createTime" label="创建时间"> </el-table-column>
      <el-table-column prop="systemuser.nickName" label="作者名称">
      </el-table-column>
      <el-table-column prop="articletype.name" label="文章类型">
      </el-table-column>
      <el-table-column width="180" label="操作">
        <template slot-scope="scope">
          <el-button icon="el-icon-edit" type="primary" size="mini" @click="toEditArticle(scope.row)">编辑</el-button>
          <el-button icon="el-icon-delete" type="danger" size="mini" @click="deleteArticle(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页区域 -->
    <el-pagination background @size-change="handleSizeChange" @current-change="handleCurrentChange"
      :current-page="queryInfo.pageNum" :page-sizes="[1, 5, 10, 15, 20]" :page-size="queryInfo.pageSize"
      layout="total, sizes, prev, pager, next, jumper" :total="total">
    </el-pagination>

    <!-- 新增和修改的对话框 -->
    <el-dialog :title="title" :visible.sync="dialogFormVisible" @close="cancle">
      <el-form :model="article">
        <el-form-item label="文章名称" label-width="80px">
          <el-input placeholder="请输入文章名称" v-model="article.articleName"></el-input>
        </el-form-item>
        <el-form-item label="文章简介" label-width="80px">
          <el-input placeholder="请输入文章简介" v-model="article.articleIntroduce"></el-input>
        </el-form-item>

        <el-form-item label="文章图片" label-width="80px">
          <!-- el-upload:上传组件
                    action:选择图片是上传的接口
                    List-type: 上传组件的类型
                    on-success:上传成功的回调函数
                    Limit: 限制只能上传一个文件
                    on-preview:图片预览的事件
                    on-remove:删除图片的事件 -->
          <el-upload :action="url + 'upload'" list-type="picture-card" :on-success="handleSuccess" :limit="1"
            :on-preview="handlePictureCardPreview" :on-remove="handleRemove" :file-list="fileList">
            <i class="el-icon-plus"></i>
          </el-upload>
          <!-- 预览图片 -->
          <el-dialog :visible.sync="dialogVisible">
            <img width="100%" :src="dialogImageUrl" alt="" />
          </el-dialog>
        </el-form-item>

        <el-form-item label="文章类型" label-width="80px">
          <el-select v-model="article.typeId" filterable placeholder="请选择">
            <el-option v-for="item in articleTypeList" :key="item.id" :label="item.name" :value="item.id">
            </el-option>
          </el-select>
        </el-form-item>

        <el-form-item label="文章详情" label-width="80px">
          <!-- 富文本编辑器组件 -->
          <quill-editor v-model="article.details"></quill-editor>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="cancle">取 消</el-button>
        <el-button type="primary" @click="addArticle">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>
<script>
import { url } from "@/util/tools.js";
export default {
    data() {
        return {
            url: '',
            // 查询信息对象
            queryInfo: {
                articleName: '',
                pageNum: 1,
                pageSize: 10
            },
            total: 183,
            articleList: [],
            articleTypeList: [],
            title: '', // 对话框标题
            dialogFormVisible: false, // 是否显示对话框
            article: { // 文章对象
                "id": '',
                "articleName": "",
                "articleIntroduce": "",
                "tabularChart": "",
                "details": "",
                "readQuantity": 0,
                "collects": 0,
                "teacherId": 0,
                "typeId": null,
                "createTime": ""
            },
            dialogVisible: false,
            dialogImageUrl: '',
            fileList: []
        }
    },
    methods: {
        // 处理上传成功的函数
        handleSuccess(response) {
            // 把上传后的图片路径，交给文章对象的tabularChart
            this.article.tabularChart = response.message;
        },

    // 删除图片的事件
    handleRemove(file, fileList) {
      console.log(file, fileList);
      // 移除数据
      this.article.tabularChart = "";
    },

    // 预览图片事件
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 删除文章
    deleteArticle(id) {
      this.$confirm("此操作将永久删除该文件, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http.delete("article/" + id).then((resp) => {
            if (resp.data.status == 200) {
              this.$message.success(resp.data.message);
              this.queryList();
            } else {
              this.$message.error(resp.data.message);
            }
          });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
    },
    // 进入添加的对话框
    toAddArticle() {
      this.title = "新增文章";
      this.dialogFormVisible = true;
      // 把当前登录的用户的id赋值为文章的teacher_id
      this.article.teacherId = sessionStorage.getItem("id");
    },
    // 进入修改的预览数据页面
    toEditArticle(row) {
      // console.log(row)
      // 赋值
      this.article = row;
      // 设置标题
      this.title = "修改文章";
      // 开启对话框
      this.dialogFormVisible = true;
      // 动态的获取图片的名称并帮到到fileList
      this.fileList = [
        {
          name: row.tabularChart,
          url: url + "downLoad?filename=" + row.tabularChart,
        },
      ];
    },
    // 添加文章
    addArticle() {
      if (this.article.id) {
        // 有值为true  修改
        this.$http.put("article/edit", this.article).then((resp) => {
          if (resp.data.status == 200) {
            // 消息提示
            this.$message.success("修改成功！");
            // 清空数据
            this.article = {
              // 文章对象
              id: "",
              articleName: "",
              articleIntroduce: "",
              tabularChart: "",
              details: "",
              readQuantity: 0,
              collects: 0,
              teacherId: 0,
              typeId: 0,
              createTime: "",
            };
            // 关闭对话框
            this.dialogFormVisible = false;
            // 重新查询
            this.queryList();
          } else {
            this.$message.error("接口异常！");
          }
        });
      } else {
        this.$http.post("article/add", this.article).then((resp) => {
          if (resp.data.status == 200) {
            // 消息提示
            this.$message.success("添加成功！");
            // 清空数据
            this.article = {
              // 文章对象
              id: "",
              articleName: "",
              articleIntroduce: "",
              tabularChart: "",
              details: "",
              readQuantity: 0,
              collects: 0,
              teacherId: 0,
              typeId: 0,
              createTime: "",
            };
            // 关闭对话框
            this.dialogFormVisible = false;
            // 重新查询
            this.queryList();
          } else {
            this.$message.error("接口异常！");
          }
        });
      }
      //  在取消函数，添加成功， 修改成功的函数中加入以下代码实现图片的清空
      this.fileList = [];
    },
    cancle() {
      this.dialogFormVisible = false;
      this.article = {
        // 文章对象
        id: "",
        articleName: "",
        articleIntroduce: "",
        tabularChart: "",
        details: "",
        readQuantity: 0,
        collects: 0,
        teacherId: 0,
        typeId: 1,
        createTime: "",
      };
      //  在取消函数，添加成功， 修改成功的函数中加入以下代码实现图片的清空
      this.fileList = [];
    },
    queryList() {
      this.$http
        .get("article/findByPage", {
          params: this.queryInfo,
        })
        .then((res) => {
          if (res.data.status == 200) {
            this.articleList = res.data.data.list;
            this.total = res.data.data.total;
          } else {
            this.$message.error("查询失败!");
          }
        });
    },
    queryArticleType() {
      this.$http.get("articletype").then((res) => {
        this.articleTypeList = res.data.data;
      });
    },
    handleSizeChange(size) {
      // console.log('每页显示数量发生改变');
      this.queryInfo.pageSize = size;
      this.queryInfo.pageNum = 1;
      this.queryList();
    },
    handleCurrentChange(num) {
      // console.log('页码发生改变');
      this.queryInfo.pageNum = num;
      this.queryList();
    },
  },
  mounted() {
    this.queryList();
    this.queryArticleType();
    // 动态的获取tool.js中的url，并赋值给当前组件的全局url
    this.url = url;
  },
};
</script>
<style>
.el-breadcrumb {
  margin-bottom: 15px;
  padding: 0 0 15px;
  border-bottom: 1px solid #ddd;
}

.el-pagination {
  margin-top: 15px;
}

.el-link {
  padding: 0 5px;
}

/**设置富文本编辑器的最小高度，注意style中不能使用scoped **/
.ql-container {
  min-height: 200px;
}
</style>
